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    <!-- 1. 斐波那契数列
    ```javascript
        1 1 2 3 5 8 13 21.......
        推导公式：fib(m) = fib(m-1) + fib(m-2)
    ``` -->

        <script>

            function fbnq(n){
                if(n===1 ||n===2){
                    return 1;
                }
                return fbnq(n-1) + fbnq(n-2);
            }
            console.log(fbnq(5));
        </script>





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